#include <iostream>
#include <bitset>
using std::cout;
using std::endl;
using std::string;
int main()
{
std::bitset<4> bs(string("1011"));
cout << bs << endl;
bs.reset(1);
cout << bs << endl;
bs.reset(0);
cout << bs << endl;
return 0;
}
/*
run:
1011
1001
1000
*/